Chandrasiri, P.S.S.W.; Abeynayake, N.R.; Wijeyewardena, L.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Jayakody, J.A.D.S.S.; Tennakoon, N.A.; Fernandopulle, M.N.D.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Athukorala, A.R.J.; Siriwardena, K.P.D.; Jayasinghe-Mudalige, U.K.; Jayasekera, S.J.B.A.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2006)
Samaraweera, S.P.D.P.; Jayasinghe, J.M.U.K.; Gangoda, U.E.K.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)